Topic
Optical microcavity
About: Optical microcavity is a research topic. Over the lifetime, 2599 publications have been published within this topic receiving 72125 citations. The topic is also known as: optical microcavities.
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TL;DR: In this paper, the use of a microcavity structure can overcome the trade-off between exciton diffusion and optical absorption in planar heterojunction organic photovoltaic cells.
Abstract: We demonstrate that the use of a microcavity structure can overcome the trade-off between exciton diffusion and optical absorption in planar heterojunction organic photovoltaic cells. Optical simulation based on the copper phthalocyanine (CuPc)-fullerene donor-acceptor system showed that the microcavity device with the spacer layer confines a large electric field inside the cavity so that high external quantum efficiency can be achieved even with a 10-nm-thick CuPc layer, which is comparable to the exciton diffusion length of the layer. The optimized microcavity device leads to an enhancement of the short circuit current of up to 51.6% compared with the conventional device.
42 citations
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TL;DR: In this article, the authors proposed a compact high-intensity room-temperature source of entangled photons based on the efficient second-order process of two-photon spontaneous emission from electrically pumped semiconductor quantum wells in a photonic microcavity.
Abstract: We propose a compact high-intensity room-temperature source of entangled photons based on the efficient second-order process of two-photon spontaneous emission from electrically pumped semiconductor quantum wells in a photonic microcavity. Two-photon emission rate in room-temperature semiconductor devices is determined solely by the carrier density, regardless of the residual one-photon emission. The microcavity selects two-photon emission for a specific signal and idler wavelengths and at a preferred direction without modifying the overall rate. Pair-generation rate in GaAs/AlGaAs quantum well structure is estimated using a 14-band model to be 3 orders of magnitude higher than for traditional broadband parametric down-conversion sources.
42 citations
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TL;DR: A novel design for a high-gain and high-speed (up to terahertz) photonic transistor and its counterpart in the quantum limit based on a linear optical effect: giant Faraday rotation induced by a single electronic spin in a single-sided optical microcavity provides a solid-state platform ideal for all-optical networks and quantum networks.
Abstract: The future Internet is very likely the mixture of all-optical Internet with low power consumption and quantum Internet with absolute security guaranteed by the laws of quantum mechanics. Photons would be used for processing, routing and com-munication of data, and photonic transistor using a weak light to control a strong light is the core component as an optical analogue to the electronic transistor that forms the basis of modern electronics. In sharp contrast to previous all-optical tran-sistors which are all based on optical nonlinearities, here I introduce a novel design for a high-gain and high-speed (up to terahertz) photonic transistor and its counterpart in the quantum limit, i.e., single-photon transistor based on a linear optical effect: giant Faraday rotation induced by a single electronic spin in a single-sided optical microcavity. A single-photon or classical optical pulse as the gate sets the spin state via projective measurement and controls the polarization of a strong light to open/block the photonic channel. Due to the duality as quantum gate for quantum information processing and transistor for optical information processing, this versatile spin-cavity quantum transistor provides a solid-state platform ideal for all-optical networks and quantum networks.
42 citations
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TL;DR: In this article, a long distance 1.4 m interaction of two different InAs/GaAs quantum dots in a photonic crystal microcavity is observed, and simultaneous coupling of both quantum dots to the cavity is demonstrated by Purcell effect measurements.
Abstract: Long distance 1.4 m interaction of two different InAs/GaAs quantum dots in a photonic crystal microcavity is observed. Simultaneous coupling of both quantum dots to the cavity is demonstrated by Purcell effect measurements. Resonant optical excitation in the p state of any of the quantum dots, results in an increase in the s-state emission of the other one. The cavity-mediated coupling can be controlled by varying the excitation intensity. These results represent an experimental step toward the realization of quantum logic operations using distant solid-state qubits.
41 citations
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PARC1
TL;DR: In this article, a device can include both a photosensing component and an optical cavity structure, with the optical cavity part including a part that can operate as a optical cavity in response to input light, providing laterally varying output light.
Abstract: A device can include both a photosensing component and an optical cavity structure, with the optical cavity structure including a part that can operate as an optical cavity in response to input light, providing laterally varying output light. For example, the optical cavity can be a graded linearly varying filter (LVF) or other inhomogeneous optical cavity, and the photosensing component can have a photosensitive surface that receives its output light without it passing through another optical component, thus avoiding loss of information. The optical cavity part can include a region that can contain analyte. Presence of the analyte affects the optical cavity part's output light, and the photosensing component can respond to the output light, providing sensing results indicating the analyte's optical characteristics.
41 citations